Endress + Hauser Liquiphant M Level Switch FTL51-GGN2DB7G4A

The Endress+Hauser Liquiphant M FTL51 is a vibronic point level switch designed for reliable detection of liquid levels in tanks, vessels, and process pipelines. Using a vibrating fork measurement principle, the FTL51 provides dependable level switching for overfill protection, dry-run protection, and pump control applications. The measurement is unaffected by changes in liquid properties, turbulence, foam, bubbles, vibration, or buildup, making it one of the most trusted level switches in the process industry.

Key Features

• Vibronic vibrating fork level switch
• Point level detection for liquids
• Extension tube design
• No calibration required
• Suitable for hazardous areas
• SIL2 / SIL3 functional safety capable
• Reliable operation independent of foam, bubbles, turbulence, or viscosity changes
• No moving mechanical parts
• Long service life with minimal maintenance
• Suitable for overfill and dry-run protection applications

Specifications

• Manufacturer: Endress+Hauser
• Product Family: Liquiphant M
• Model: FTL51-GGN2DB7G4A
• Measuring Principle: Vibronic (Vibrating Fork)
• Application: Point Level Detection
• Medium: Liquids
• Process Temperature:
  • -50°C to +150°C
• Process Pressure:
  • Vacuum to 100 bar
• Minimum Density:
  • 0.5 g/cm³ (0.4 g/cm³ optional)
• Sensor Material:
  • 316L Stainless Steel
• Process Connections:
  • Threaded, Flanged, or Hygienic versions available
• Certifications:
  • ATEX
  • IECEx
  • SIL2 / SIL3
  • WHG Overfill Protection
• Hazardous Area Approved

Function

The Liquiphant M FTL51 uses a vibrating tuning fork that changes frequency when immersed in liquid. The electronics detect this change and provide a switching output for process control systems. Because the measurement principle is independent of conductivity, dielectric constant, foam, turbulence, or product buildup, the FTL51 offers highly reliable point level detection in demanding industrial environments.

Typical Applications

• Tank overfill protection
• Low-level and dry-run protection
• Chemical processing
• Oil & gas facilities
• Refineries
• Water and wastewater treatment
• Food & beverage production
• Pharmaceutical manufacturing
• General industrial liquid storage and process vessels